已知xy满足(x+1)^2+y-2=0 求代数式-2xy+(1/2x^2y^2-3y)*2x+6xy
已知xy满足(x+1)^2+y-2=0 求代数式-2xy+(1/2x^2y^2-3y)*2x+6xy
已知xy/x+y=1/2,则代数式3x-5xy+3y/-x+3xy-y=
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+x(xy+y)的值
已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y
已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值
已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy
已知xy/x+y=2,求代数式3x-xy+3y/-x+3xy-y的值
已知x-y=2xy,求代数式3x-5xy-3y/x+xy-y的值
已知x+y=-1,xy=-2,求代数式-5(x+y)+(x-y)+2(xy+y)的值
已知X+Y=-1,xy=-2,求代数式-5(x+y)+(x-y)+(xy+y)的值
已知x+xy=-2,xy-y=-6求代数式2x{-4y-3[(x+xy)²+x]-½[(y-xy
已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y